Banks Power Chevy_GMC Trucks: Diesel ’93 - 96 6.5L Power Systems- Stinger System '93-early '94 (non-cat) & '94-up ( w_ cat) Pickups & Suburbans w_ factory turbo option - Manual (Page 12)

12
PUMP AdJUstMeNt ProcedUre
NOTE: This section applies to 1993 and early 1994
model year vehicles only.
NOTE: The engine must be COLD before starting this
procedure.
NOTE: Utmost cleanliness should be exercised. Do
NOT use any rags during the adjustment procedure.
The lint from the rag can clog an injector. Lay all
parts on clean newspaper during the adjustment
procedure.
Make sure both battery ground cables are disconnected.
disconnect the wiring from the top of the fuel injection
pump cover. note their location for reassembly.
place a drip pan under the rear of the engine to catch
fuel. clean the upper portion of the pump with diesel
fuel or a parts cleaning solvent. See Figures 8 and 9 .
Do NOT clean the pump while the engine is hot, as
doing so may damage the pump.
remove the fuel return line from the pump cover.
remove the top attaching bolt and loosen the lower
attaching bolts on the fast idle solenoid and place the
solenoid aside. remove the pump cover bolts and
remove the cover.
IMPORTANT: utmost care must be used to prevent
damage.
using a syringe or similar means, remove as much
diesel fuel as possible from the injector pump housing.
This will make it easier to view the allen-head
adjustment screw through the slot in the bottom of the
pump housing when it is rotated into position.
rotate the engine slowly by hand, in a clOckWise
direcTiOn OnlY, using a breaker bar, a short extension
and a 15 /
16
” socket on the vibration damper bolt to bring
the allen screw into view in the inspection slot in the
bottom of the pump bowl (see Figure 6 ). it may be
necessary to remove the front crankshaft pulley to gain
access to the vibration damper bolt to turn the engine
over. do Not AtteMPt to rotAte the eNGiNe with
THe sTarTer. The allen head screw may be hard to
see – a flashlight or shop light may help. The screw will
have to be adjusted at an angle from under the guide
stud/spring assembly.
Using a
5 /
32
” ball-end style allen wrench, rotate the allen
screw as indicated earlier. clockwise increases fuel,
counterclockwise decreases fuel.
NOTE: The Allen-screw turns fairly tightly, and is
self-locking. Turning the screw clockwise adds fuel.
Keep track of your adjustments.
inspect the pump cover to make sure the seal is seated
in the cover. replace if questionable. fill the pump
figure 8
p.n. 96309 v.3.0